Installing the main bearing shells
- A - slot
- B - protrusion on the liner
- C - lubrication hole
1. Install new main bearing shells.
2. Install thrust washers.
Checking the lubrication clearance of the main bearings
1. An internal micrometer or other special device can be used to measure the lubrication gap, but the most accurate and easiest method is to use a special plastic gauge.
2. Clean the crankshaft, bearings and oil holes, then carefully install the crankshaft onto the bearings.
3. Lay a piece of plastic on each of the main bearings along the axis of the shaft.
4. Install the main bearing caps being careful not to move the plastic. Tighten the fixing bolts of the covers to the required tightening torque in the sequence shown. Do not turn the crankshaft.
5. Loosen the screws and carefully remove the covers.
6. Compare the crushed film width with a special scale to determine the lubrication gap.
7. If the clearance is not within specifications, install a different size of bearings. Bearings can be turned if necessary.
8. Carefully remove traces of film from the shaft and bearings.
Final installation
1. Carefully remove the crankshaft.
2. Clean the surface of the bearings and lubricate them with grease or engine oil.
3. Check that the crankshaft bearings are clean and reinstall the crankshaft.
4. Lubricate and install the lower bushings.
5. Install thrust washers.
6. Establish covers of radical bearings and insert fixing bolts.
7. Tighten the bolts to the required torque.
8. Tighten the bolts to the required angle.
9. Turn the crankshaft by hand several times and check for ease of movement.
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